Siphonproof fuel tank



April 28, 1936. I w Q READEKER I 2,038,676

SIPHONPROOF FUEL TANK Filed Jan. 11, 1955 [Tat/672%?! K412556097, CEeczcZeZer:

Patented Apr. 28, 1936 UNITED STATES PATENT OFFICE SIPHONPROOF FUEL TANKWilliam C. Readeker, Chicago, Ill.

Application January 11, 1935, Serial No. 1,403

2 Claims.

This invention relates to that type of siphon proof fuel tanks in whicha baffle member is arranged in or adjacent to the filling inlet of thetank for the purpose of-preventing the introduction of a flexiblesiphoning tube into the main chamber thereof with a view to a feloniousremoval of the fluid fuel contents of the tank; and this improvement hasfor its object:

To provide a structural formation and association of parts in a fueltank of the type above referred to, whereby the abstraction of a verysmall amount of the fluid contained in the tank can be made, even whenthe same is completely filled with fluid fuel, and with which anavoidance of short turns in the path of the fluid inflow, and theconsequent disturbance, retardation in and loss by spilling of the fluidfuel, which would occur with pressure filling apparatus now 1n genvicesare provided in the inlet passage of fuel tanks. All as will hereinaftermore fully appear.

In the accompanying drawing: Fig. 1 is a central longitudinal section ofa motor vehicle fuel tank to which the preferred form of this inventionis applied.

Fig. 2 is a horizontal section of same on line 22 Fig. 1.

Fig. 3 is a detail transverse sectlon on line 33 1. ig. 4 is a centraldetail longitudinal sect1on of a modified form of the invention.

Like reference numerals indicate like parts in the different views.

The fuel tank I may be of any usual form now in use on motorvehiclesand. the like, a closed and horizontally arranged cylindrical form oftank I being shown in the drawing as a means for illustrating thepractical-application of this invention. A material part or feature ofthis invention comprises the provision of a dome shaped member or shell5, fixedly attached to the top portion or crown of the tank I andopening into same for cooperation with the other features of theinvention. I

In the preferred application of this improvement as shown in Figs. 1, 2and. 3 the usual filling spout 2 of the tank passes horizontally throughan end head 3 at a point closely adjacent to the top of the same, and inthe preferred construction shown the opening of said spout into theinterior of the tank I has its lower portion arranged in horizontalalignment with the bottom eral use, and when ordinary forms of safetydeweb or wall of the open top bailie member now to be described.

The baflle member above referred to, in its preferred'form as shown inFigs. 1 and 2, is of an elongated U shape, comprising a bottom weborwall 4 having an upstanding marginal flange or wall 4' in order toimpart to the baffle member the form of a shallow open toptray. Saidbaffle member is rigidly attached at one end to the inner end of thefilling spout 2, with its inner semicircular end portion arranged inconcentric relation to a fiat dome or crown extension 5 formed in thetop wall of the tank I, adjacent to the end thereof to which the fillingneck 2 has attachment.

In this improvement the top line of the aforesaid upstanding flange orwall 4 of the baffle member is positioned on, or closely adjacent to,the horizontal bottom line of the crown or dome extension 5, aforesaid,and as so arranged constitutes a material part or feature of thisinvention in that it provides effective means for preventing theinsertion of a flexible siphon tube into the interior of the tank forfelonious abstraction of the fuel contents therefrom. In addition itprovides for a complete filling of the tank with fluid fuel and at thesame time materially reduces the lateral swash of the fuel in the tankwhen in road service and the splashing and leakage of the fuel into andout of the spout 2, which is an ordinary occurence with the ordinaryform of fuel tanks.

In the modification shown in Fig. 4, the dome shaped member or shell 5on the top of the fuel tank I is of a circular shape and carries thevertically arranged filling spout 2' of the tank, which in theconstruction carries a fixed sleeve 6 which depends a distance belowsaid inlet spout and in turn carries at its lower end a circular bafflemember comprising a bottom web or wall 4 and an upstanding marginal wallor flange 4 similar in structure and purpose to the above describedpreferred form of the invention and arranged in like manner in relationto the bottom line of a crown or dome shaped member or shell 5' at thetop of the tank.

The inflow of fluid fuel into the tank I is down I 1. A siphon prooffuel tank, comprising a closed tank, a dome shaped member or shellattached to the top or crown portion of said tank, and. havingcommunication with the interior of the tank, a filling spout associatedwith said dome shaped member, a baflle member arranged in concentric andclosely adjacent relation to the base line of said dome shaped member orshell and comprising a bottom wall and an upstanding marginal wallimparting a shallow open top chamber formation to the baffle memberadapted to receive the incoming fuel from the filling spout. r v

2. A siphon proof fuel tank, as specified in claim 1, wherein thefilling'spout has connection with the interior of the tank at the upperportion of an end Wall of the tank. 7

WILLIAM C. READEKER.

